HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 458

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Bit 29:
TFP1
0
1
Note: In the preceding and following descriptors, a logically positive relationship must be
Bit 27—Tx Frame Error (TFE): Indicates that one or other bit of the transmit frame status
indicated by bits 26 to 0 is set. Whether or not the transmit frame status information is copied into
this bit is specified by the Tx/Rx status copy enable register.
Bit 27: TFE
0
1
Bits 26 to 0—Tx Frame Status 26 to 0 (TFS26 to TFS0): These bits indicate the error status during
frame transmission.
Tx Descriptor 1 (TD1): Specifies the transmit buffer length (maximum 64 kbytes).
Bits 31 to 16—Tx Data Length (TDL): These bits specify the valid transfer byte length in the
corresponding transmit buffer.
Note: When the one frame/multi-buffer system is specified (TD0.TFP = 10 or 00), the transfer
Bits 15 to 0—Reserved
TFS26 to TFS5—Reserved
TFS4—Illegal Tx Frame (corresponds to EESR.ITF)
TFS3—Carrier Not Detect (corresponds to EESR.CND)
TFS2—Detect Loss of Carrier (corresponds to EESR.DLC)
TFS1—Collision Detect (corresponds to EESR.CD)
TFS0—Tx Retry Over (corresponds to EESR.TRO)
maintained between the settings of this bit and the TDLE bit.
byte length specified in the descriptors at the start and midway must align with a longword
boundary (bits 17 and 16 = 00).
Bit 28:
TFP0
0
1
0
1
Description
No error during transmission
An error of some kind occurred during transmission (see bits 26 to 0)
Description
Frame transmission for transmit buffer indicated by this descriptor continues
(frame is not concluded)
Transmit buffer indicated by this descriptor contains end of frame (frame is
concluded)
Transmit buffer indicated by this descriptor is start of frame (frame is not
concluded)
Contents of transmit buffer indicated by this descriptor are equivalent to one
frame (one frame/one buffer)
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